Authors
Valdis Bisters
University of Latvia, Raina blvd. 19,, Riga, Latvia
Juris Burlakovs
University of Latvia, Raina blvd. 19,, Riga, Latvia
© 2018 Maris Klavins, Valdis Bisters, Juris Burlakovs, published by Riga Technical University
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.